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metallic, covalent, ionic bonding
Terms in this set (34)
covalent bonds are between
2 or more NONMETALS
essence of a covalent bond is
the sharing of electrons
the compounds formed are called
molecular compounds. they make molecules so we call them this.
molecular compounds are generally
liquids or gasses at room temp. low melting/boiling. don't conduct.
the amount of attraction an element has for electrons in a covalent bond.
higher the electronegativity..
stronger pull on electrons
2 partial charges(partial positive, partial negative)
non polar covalent
.4 or less. equal sharing 50%-50%. no charge.
.5-1.9. un equal sharing 40%-60% to 10% 90%. partial charges (S+, S-)
2.0 or more. complete electron transfer. full charge, either + or -
valence shell electron pair repulsion. predicts the shape a molecule will have
VSEPR theory looks at..
the outer level of electrons to see how they will repel each other, determining the shape of the molecule
pair of electrons that belong to only one atom
pair of electrons that belong to 2 atoms, also a covalent bonf
atoms in the center of the molecule
atoms at the ends of the molecule
180. often only 2 atoms or 2 double bonds.
120. 3 shared electron paris, and 0 unshared pairs on central atom.
109.5. 4 shared electron pairs, and 0 unshared pairs on central atom.
107. 3 shared electron pairs and 1 unshared pair on central atom.
104.5. 2 shared electron paris and 2 unshared paris on central atom.
when the poles (partial and negative charges) of a polar molecule are attached to the the poles of another polar molecule
dipole-dipole bonds. hydrogen bonded to only nitrogen, oxygen, or fluorine. strongest kind of Vander Waals forces
IMF forces know as this
Van der Waals forces
forces within the molecule
forces between molecules. weaker than any kind of bond.
the stronger the Van der Waals forces the
higher the melting and boiling points are of the substance
if the nature of the bod is nonpolar
then the molecule is nonpolar
if he nature of the bond is polar and the molecule is non polar
then there is symmetrical shape. 3 atom linear, trigonal planar, tetrahedral.
3 atom linear, trigonal planar, tetrahedral
if the nature of the bod is polar and the molecule is polar
then there is asymmetrical shape. 2 atom linear, pyramidal, bent.
2 atom linear, pyramidal, bent.
to determine if a molecule is polar or non polar you need to look at
the shape and the type of bond of the molecule
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